* {
    padding: 0%;
    margin: 0%;
    box-sizing: border-box;
}

body {
    width: 1350px;
    height: 100vh;
    margin: 0 auto;
    background-color: rgb(170, 194, 170);
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
}

header {
    width: 85%;
    height: 95%;
    /* border: 1px solid #fff; */
    display: flex;
    flex-wrap: wrap;
    overflow: hidden;
}

header .menu_side,
.song_side {
    position: relative;
    width: 25%;
    height: 90%;
    /* border: 1px solid #fff; */
    background-color: rgb(141, 163, 141);
    box-shadow: 5px 0px 2px #090f1f;
    color: #fff;
}


header .song_side {
    width: 75%;
    background: rgb(141, 163, 141);
}

header .master_play {
    width: 100%;
    height: 10%;
    background: rgb(141, 163, 141);
    ;
    box-shadow: 0px 3px 8px #090f1f;
}


header .menu_side h1 {
    font-size: 20px;
    margin: 15px 0 0 20px;
    font-weight: 500;
}

header .menu_side .playlist {
    margin: 40px 0 0 20px;
}

header .menu_side .playlist h4 {
    font-size: 14px;
    font-weight: 400;
    padding-bottom: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    color: #4c5262;
    transition: .3s linear;
}

header .menu_side .playlist h4:hover {
    color: #fff;
}

header .menu_side .playlist h4 span {
    position: relative;
    margin-right: 35px;
}

header .menu_side .playlist h4 span::before {
    content: '';
    position: absolute;
    width: 4px;
    height: 4px;
    border: 2px solid #4c5262;
    border-radius: 50%;
    top: -4px;
    transition: .3s linear;
}

header .menu_side .playlist h4:hover span::before {
    border: 2px solid #fff;
}

header .menu_side .playlist h4 .bi {
    display: none;
}

header .menu_side .playlist .active {
    color: #36e2ec;
}

header .menu_side .playlist .active span {
    display: none;
}

header .menu_side .playlist .active .bi {
    display: flex;
    margin-right: 20px;
}

header .menu_side .menu_song {
    width: 100%;
    height: 300px;
    /* border: 1px solid #fff; */
    margin-top: 40px;
}

header .menu_side .menu_song li {
    position: relative;
    list-style-type: none;
    padding: 5px 0 5px 20px;
    display: flex;
    align-items: center;
    margin-bottom: 10px;
    cursor: pointer;
    transition: .3s linear;
}

header .menu_side .menu_song li:hover {
    background: rgb(105, 105, 170, .1);
}

header .menu_side .menu_song li span {
    font-size: 12px;
    font-weight: 600;
    color: #4c5262;
}

header .menu_side .menu_song li:hover {
    background: rgb(105, 105, 170, .1);
}

header .menu_side .menu_song li img {
    width: 32px;
    height: 32px;
    margin-left: 25px;
}

header .menu_side .menu_song li h5 {
    font-size: 11px;
    margin-left: 15px;
}

header .menu_side .menu_song li h5 .subtitle {
    font-size: 9px;
    color: #4c5262;
}

header .menu_side .menu_song li .bi {
    position: absolute;
    right: 15px;
    top: 6px;
    font-size: 16px;
}

header .master_play {
    display: flex;
    align-items: center;
    padding: 0px 20px;
}

header .master_play .wave {
    width: 30px;
    height: 30px;
    /* border: 1px solid #fff; */
    padding-bottom: 5px;
    display: flex;
    align-items: flex-end;
    margin-right: 10px;
}

header .master_play .wave .wave1 {
    width: 3px;
    height: 10px;
    margin-right: 3px;
    border-radius: 10px 10px 0px 0px;
    background: #36e3ec;
    animation: unset;
}

header .master_play .wave .wave1:nth-child(2) {
    height: 13px;
    /* animation-delay: .4s; */
}

header .master_play .wave .wave1:nth-child(3) {
    height: 8px;
    /* animation-delay: .8s; */
}

/* javascript class wave */
header .master_play .active2 .wave1 {
    animation: wave .5s linear infinite;
}

header .master_play .active2 .wave1:nth-child(2) {
    animation-delay: .4s;
}

header .master_play .active2 .wave1:nth-child(3) {
    animation-delay: .8s;
}

@keyframes wave {
    0% {
        height: 10px;
    }

    50% {
        height: 15px;
    }

    100% {
        height: 10px;
    }
}

header .master_play img {
    width: 35px;
    height: 35px;
}

header .master_play h5 {
    width: 130px;
    font-size: 13px;
    margin-left: 15px;
    color: #fff;
    line-height: 15px;
}

header .master_play h5 .subtitle {
    font-size: 11px;
    color: #4c5262;
}

header .master_play .icon {
    font-size: 20px;
    color: #fff;
    margin: 0px 20px 0px 40px;
}

header .master_play .icon .bi {
    cursor: pointer;
    outline: none;
}

header .master_play .icon .bi:nth-child(2) {
    border: 1px solid rgb(105, 105, 170, .1);
    border-radius: 50%;
    padding: 1px 3px 0px 6px;
    margin: 0px 5px;
    transition: .3s linear;
}

header .master_play span {
    color: #fff;
    width: 32px;
    font-size: 11px;
    font-weight: 400;
}

header .master_play span #currentStart {
    margin: 0 0 0 20px;
}

header .master_play .bar {
    position: relative;
    width: 43%;
    height: 2px;
    background: rgb(105, 105, 170, .1);
    margin: 0 15px 0 10px;
}

header .master_play .bar .bar2 {
    position: absolute;
    background: #36e2ec;
    width: 0%;
    height: 100%;
    top: 0;
    transition: 1s linear;
}

header .master_play .bar .dot {
    position: absolute;
    width: 5px;
    height: 5px;
    background: #36e2ec;
    border-radius: 50%;
    left: 0%;
    top: -1px;
    transition: 1s linear;
}

header .master_play .bar .dot::before {
    content: '';
    position: absolute;
    width: 15px;
    height: 15px;
    border: 1px solid #36e2ec;
    border-radius: 50%;
    left: -6px;
    top: -6px;
    box-shadow: inset 0 0 3px #36e2ec;
}

header .master_play .bar input {
    position: absolute;
    width: 100%;
    top: -6px;
    left: 0;
    cursor: pointer;
    z-index: 9999999;
    transition: 3s linear;
    opacity: 0;
}

header .master_play .vol {
    position: relative;
    width: 100px;
    height: 2px;
    margin-left: 50px;
    background: rgb(105, 105, 170, .1);
}

header .master_play .vol .bi {
    position: absolute;
    color: #fff;
    font-size: 25px;
    top: -13px;
    left: -30px;
}

header .master_play .vol input {
    position: absolute;
    width: 100%;
    top: -10px;
    left: 0;
    cursor: pointer;
    z-index: 9999999;
    transition: 3s linear;
    opacity: 0;
}

header .master_play .vol .vol_bar {
    position: absolute;
    background: #36e2ec;
    width: 0%;
    height: 100%;
    top: 0;
    transition: 1s linear;
}

header .master_play .vol .dot {
    position: absolute;
    width: 5px;
    height: 5px;
    background: #36e2ec;
    border-radius: 50%;
    left: 0%;
    top: -1px;
    transition: 1s linear;
}

header .master_play .vol .dot::before {
    content: '';
    position: absolute;
    width: 15px;
    height: 15px;
    border: 1px solid #36e2ec;
    border-radius: 50%;
    left: -6px;
    top: -6px;
    box-shadow: inset 0 0 3px #36e2ec;
}

header .song_side {
    z-index: 2;
}

/* 有改变 */
header .song_side::before {
    content: '';
    position: absolute;
    /* width: 100%; */
    width: 740px;
    height: 220px;
    left: 40px;
    background: url('/img/16.jpg');
    background-size: 1024px 800px;
    background-position: 60% 30%;
    z-index: -1;
    background-repeat: no-repeat;
}

header .song_side nav {
    width: 90%;
    height: 10%;
    margin: auto;
    /* border: 1px solid #fff; */
    display: flex;
    align-items: center;
    justify-content: space-between;
}

header .song_side nav ul {
    display: flex;
}

header .song_side nav ul li {
    position: relative;
    list-style-type: none;
    font-size: 13px;
    color: #4c5262;
    margin-right: 25px;
    cursor: pointer;
    transition: .3s linear;
}

header .song_side nav ul li:hover {
    color: #fff;
}

header .song_side nav ul li:nth-child(1) {
    color: #fff;
}

header .song_side nav ul li span {
    position: absolute;
    width: 100%;
    height: 2.5px;
    background: #36e2ec;
    bottom: -5px;
    left: 0;
    border-radius: 20px;
}

header .song_side nav .search {
    position: relative;
    width: 40%;
    padding: 1px 10px;
    border-radius: 20px;
    color: gray;
}

header .song_side nav .search::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 20px;
    background: rgb(184, 184, 184, .1);
    backdrop-filter: blur(5px);
    z-index: -1;
}

header .song_side nav .search .bi {
    font-size: 13px;
    padding: 3px 0px 0px 10px;
}

header .song_side nav .search input {
    background: none;
    outline: none;
    border: none;
    padding: 0px 10px;
    color: #fff;
    font-size: 12px;
}

header .song_side nav .user {
    position: relative;
    width: 30px;
    height: 30px;
    border-radius: 50px;
    cursor: pointer;
}

header .song_side nav .user img {
    position: absolute;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    box-shadow: 2px 2px 8px #131312;
}

header .song_side .content {
    width: 90%;
    height: 30%;
    margin: auto;
    /* border: 1px solid #fff; */
    padding-top: 20px;
}

header .song_side .content h1 {
    font-size: 25px;
    font-weight: 600;
}

header .song_side .content p {
    font-size: 11px;
    font-weight: 400;
    color: #4c5262;
    margin: 5px;
}

header .song_side .content .buttons {
    margin-top: 15px;
}

header .song_side .content .buttons button {
    width: 130px;
    height: 30px;
    border: 2px solid #36e2ec;
    outline: none;
    border-radius: 20px;
    background: #5adae0;
    color: #fff;
    cursor: pointer;
    transition: .3s linear;
}

header .song_side .content .buttons button:hover {
    border: 2px solid #36e2ec;
    background: none;
    color: #36e2ec;
}

header .song_side .content .buttons button:nth-child(2) {
    border: 2px solid #36e2ec;
    background: none;
    color: #36e2ec;
}

header .song_side .content .buttons button:nth-child(2):hover {
    border: 2px solid #36e2ec;
    background: #36e2ec;
    color: #fff;
}

/* 53：30 */
header .song_side .popular_song {
    width: 90%;
    height: auto;
    /* border: 1px solid #fff; */
    margin: auto;
    margin-top: 15px;
}

header .song_side .popular_song .h4 {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

header .song_side .popular_song .h4 .bi {
    color: black;
    cursor: pointer;
    transition: .3s linear;
}

header .song_side .popular_song .h4 .bi:hover {
    color: #fff;
}

/* ??? */
header .song_side .popular_song .pop_song {
    width: 100%;
    height: 150px;
    margin-top: 15px;
    display: flex;
    overflow-x: auto;
    scroll-behavior: smooth;
}

header .song_side .popular_song .pop_song::-webkit-scrollbar {
    display: none;
}

header .song_side .popular_song .pop_song li {
    min-width: 100px;
    height: 140px;
    list-style-type: none;
    margin-right: 10px;
    transition: .3s linear;
}

header .song_side .popular_song .pop_song li:hover {
    background: rgb(105, 105, 170, .1);
}

header .song_side .popular_song .pop_song li .img_play {
    position: relative;
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
}

header .song_side .popular_song .pop_song li .img_play img {
    width: 100px;
    height: 100px;
}

header .song_side .popular_song .pop_song li .img_play .bi {
    position: absolute;
    font-size: 20px;
    cursor: pointer;
    transition: .3s linear;
    opacity: 0;
}

header .song_side .popular_song .pop_song li .img_play:hover .bi {
    opacity: 1;
}

header .song_side .popular_song .pop_song li h5 {
    padding: 5px 0 0 5px;
    line-height: 15px;
    font-size: 10px;
}

header .song_side .popular_song .pop_song li h5 .subtitle {
    font-size: 9px;
    color: #4c5262;
}


header .song_side .popular_artists {
    width: 90%;
    height: auto;
    /* border: 1px solid #fff; */
    margin: auto;
    margin-top: 15px;
}

header .song_side .popular_artists .h4 {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

header .song_side .popular_artists .h4 .bi {
    color: black;
    cursor: pointer;
    transition: .3s linear;
}

header .song_side .popular_artists .h4 .bi:hover {
    color: #fff;
}

header .song_side .popular_artists .item {
    width: 100%;
    height: auto;
    margin-top: 10px;
    display: flex;
    overflow-x: auto;
    scroll-behavior: smooth;
}

header .song_side .popular_artists .item::-webkit-scrollbar {
    display: none;
}

header .song_side .popular_artists .item li {
    list-style-type: none;
    position: relative;
    min-width: 60px;
    height: 60px;
    /* background-color: #fff; */
    border-radius: 50%;
    margin-right: 20px;
    cursor: pointer;
}

header .song_side .popular_artists .item li img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    position: absolute;
}

/* 响应式布局 - 屏幕尺寸小于 800px 时，两列布局改为上下布局 */
@media screen and (max-width: 800px) {
    .menu_side {
        width: 100%;
        padding: 0;
    }
}

/* 响应式布局 -屏幕尺寸小于 400px 时，导航等布局改为上下布局 */
@media screen and (max-width: 400px) {
    .song_side {
        float: none;
        width: 100%;
    }
}